Automatic brake for sound-reproducing machines.



E. O. KLEMM.

AUTOMATIC BRAKE FOR SOUND REPRODUOING MACHINES.

APPLICAxION FILED JUNE 24,1912

Patented Mar. 3, 1914.

INVENTOR 2 6620120 10. fiwlzlfl/ WITNESSES EDWIN O. KLEMM, OF SAGINAW, MICHIGAN.

AUTOMATIC BRAKE FOR SOUND-REPRODUCING MACHINES.

Specification of Letters Patent.

Patented M an 3, 1914.

Application filed June 24, 1912. Serial No. 705,464.

T 0 all 101mm 1' t may concern:

Be it.known that I, EDWIN O. KLEMM,.

a citizen of the United States, residing at Saginaw, in the county of Saginaw and State of Michigan, have invented cert-am new and useful Improvements in Automatic Brakes for Sound-Reproducing Machines, of which the following is a specification.

The present invention relates to improvements in automatic brakesfor sound reproducing machines designed particularly for use in connection with such machines of the disk type.

The object in View is to provide brake mechanism capable of automatically stopping the rotation of the turn-table upon which the record is carried immediately upon completion of the record being reproduced.

Still a further object of my device is the provision in association with the braking mechanism of means for adjusting the same to operate the brake at a predetermined time controlled primarily by the length of the groove of the record or the point at which the sound to be reproduced ceases.

For a full understanding of the present invention, reference is to be had to the following description and the accompanying drawings, in which- Figure 1 is a top plan view of a machine equipped with m invention, parts being broken away to s ow more clearly the details of construction; Fig. 2 is a side elevation; Fig. 3 is a fragmentary view showing a modified form of brake lever for operation against the outer flanged periphery of the turn-table; Fig. 4 is a fragmentary sectional view taken about on the line 44 of describing the invention, A designates the casing of a sound producing machine, in

which is contained a motor for revolving the turn-table B, said casing having revolubly mounted thereupon the reproducer arm C which in turn carries the sound box D and stylus E, all of conventional form.

The brake mechanism constituting my invention is mounted substantially beneath the turn-table B- and consists of a base or adjusting plate 1 preferably of somewhat triangular shape. pii'otally mounted at its reduced or tapered portion upon the spindle 2 which carries the turn-table aforesaid, said plate resting upon the top of the casing A. The plate 1 is provided with a stud 3 on its upper surface which forms the pivot of a controlling lever 4. The controlling lever 4 is formed at one side with a projecting arm 5 which extends beyond'the turn-table B and is bent upwardly, the length of said arm being such that it Will lie in the path of the -reproducer arm C. Also pivotally mounted intermediate its length upon stud 3 is the brake lever 6, one end of which is bent upwardly adjacent the inner flanged periphery of the turn-table B, the bent portion designated 6 constituting a brake shoe which is provided with the leather or other suitably covered face. The opposite end portion of the lever 6 extends toward the central portion of the machine, and has connected thereto one end of a spring 7, the other end of the latter being suitably secured to the adjusting late 1.

Near the outer edge portion 0 the plate 1 is pivotally mounteda pawl 8, the free hooked end of which is adapted to engage with a lug 9 which is suitably fastened or formed on the surface of the brake lever 6.

On one edge of the controlling lever are formed upwardly projecting spaced guide lugs 10 betweenwhich the pawl 8 lies, as clearly shown in Fig. 1.

Vith the foregoing in view, it is to be understood that the brake mechanism as shown in Fig. l is in a position ready to be tripped,

7 immediately pulls the lever 6 around on itspivot, and forces the shoe 6 to impinge against the flanged periphery of the turntableB, stopping the rotation of the latter in an obvious way.

As sound reproducing records vary considerably in length, it is desirable to provide means for actuating the brake mechanism above described at a predetermined time, and to this endl form the face or adjusting plate 1 with a forked extension 12 which is' bent upwardly beyond the edge portion ofthe' turn-table and back again parallel with the top of the casing A as shown most clearly in Fig. 2. Suitably mounted upon the top of the casing Ain a socket 13 is an eccentric cam 14, the edge portion of which is grooved to receive the desirable manner such as shown in Fig. 1 big placing a pastor bearing a numeral, whic in this instance is 4. \Vhen the record is to be reproduced, the operator moves the cam 14 by means of the knob 15 to a position corresponding to the numeral 4 on the disk above mentioned, this position being determined by'an arrow on the cam 14, which is turned to the corresponding numeral 4 which is marked upon a forked extension 12. The movement of the cam 14 will obviously move the plate 1 backward or forward so as to bring the arm 5 of the controlling lever into contact with the reproducer arm at a sooner or later time. Thus, if the record be a short one, the designated numeral on the record will indicate to the operator that the arm is to be moved forwardly to contact with the reproducer arm C at the corre sponding point as indicated by the numeral on the forked extension 12. Accordingly, if the record be longer, the arm 5 is moved backwa'rdly away from the reproducer arm a farther distance.

The advantages of my device as above described, will be apparent to those skilled in the art to which it refers. The operator needs only to place the record upon the turntable with the preliminary adjustment hereinbefore described, and the record may then be reproduced without further attention on the part of the operator when it has been completed.

Various changes may be made in the dc tails of construction of my device without departing from the spirit ofthe invention, and within the scope of the claims hereto ap ended.

t may be desirable that the brake shoe 0 erate against the outer flanged periphery of the turn-table, and in Fig. 3, I have shown the lever 6 formed with a shoe 6 which projects beyond the outer circumference of the turn-table B for frictional contact therewith. In setting the brake mechanism when the record has been placed upon the turn-table, the operator'moves the arm 5 forwardly, thereby bringing a stud 4 carried by the surface of the controlling lever 4 into contact with the edge of the brake lever 6 mounted thereupon. The lever 6 is thus moved until the pawl 8 is caused by the guide lugs 10 to engage around the lug 9 on the brake lever:

6, placing said lever under the tension of the spring 7. In Fig. 3, the modified formof brake lever 6 is provided with a notch in which'the stud 4 on the controlling lever 4 operates as'above described.

lit is preferable for purpose of. convenience that the paster, carried by therecord and which indicates the point of tripping of the brake, shouldhave associated therewith a letter to denote the style of needle to'be used with that record to produce best results, for example, F indicating fiber needle, M for musical, H for half tones, etc.

Having thus described the invention, what is claimed as new is:

1. An automatic brake for sound reproducing machines comprising, in combination. a rotating element and a moving element, a brake lever, a spring connected with one end of the brake lever and normally holding the same under tension, a brake shoe on the opposite end of the lever, a lug carried by the brake lever, a pawl having its free end adapted to engage with the lug aforesaid to hold the brake shoe from contact with the rotating element, a controlling lever cooperating with the brake lever an having an arm lying in the path of movement of the moving element aforesaid, and spaced guir'i. lugs carried by the controlling lever between which 'the pawl aforesaid rests, whereby the pawl may be disengaged from the lug on the brake lever by contact of the moving element with the arm of the controlling lever.-'

2. An automatic brakefor sound reproducing machines comprising, in comblnat-ion, a rotating element and a moving element, a brake lever adapted to cooperate with the rotating element, a controlling lever adapted to release the brake lever to. permit operation of the same, variable adjusting means upon which the brake and controlling levers are mounted, and means for moving the last mentioned adjusting means to adjust the position of the controlling lever aforesaid for operation of the brake at variable times.

8. An automatic brake for sound reproducing machines comprising, in combination, a rotating element and a moving element, a brake lever adapted to cooperate with the rotating element, a controlling lever adapted to operate the brake lever, an adjusting plate upon which the brake and controlling levers are mounted having an extension formed thereon, and means carried by the machine cooperating with .the extension of the adjusting plate for moving the latter in apath parallel with the path of travel of the periphery of the rotating element to adjust the position of the controlling lever.

4. An automatic brake for sound reproducing machines comprising, in combination, a rotating element and a moving element, an adjusting plate, a controlling lever asso ciated with the plate and adapted to engage with the moving element, a spring actuated brake lever normally held disengaged from the rotating element, and an indicator movable to adjust the plate aforesaid and thereby adjust the position of the controlling lever for operation of the brake lever at a predetermined time.

5. An automatic brake for sound reproducing machines comprising, in combination, a rotating element and a moving element, an adjusting plate, a controlling lever associated with the late and adapted to cooperate with the moving element, a spring actuated brake lever normally held disengaged from the rotating element, and an cc centric cam cooperating with the'adjusting plate and movable to adjust the controlling lever for operation of the brake lever at a predetermined time. v

6. An, automatic brake for sound reproducing machines comprising, in combination, a rotating element and a moving element, an adjustin plate pivotally mounted beneath the rotating element and having ,a forked extension projecting beyond the latter, a controlling lever pivotally mounted upon the plate aforesaid, an arm carried by said lever and in the path of movement of the moving element, a spring actuated brake lever pivotally mounted upon the plate and cooperating with the controlling lever, 'a'

pawl carried by the plate and adapted to engage with the brake lever to hold the same from contact with the rotating element, and an eccentric cam comprising an indicator cooperating with the forked extension of the adjusting plate, whereby the arm of the controllin lever may be adjusted to operate the brake ever.

7. An automatic brake for sound reproducing machines comprising, in combination, .a rotating element and a moving'element, an adjusting plate pivotally mounted beneath the rotating element and having a forked extension projecting beyond the same, a controlling lever pivotally mounted upon said plate and having spaced vertical guide lugs formed thereon, an arm carried by the controlling lever and bent upwardly into the path of movement of the'moving element, said controlling lever having a stud -thereon, a spring actuated brake lever pivotally mounted upon the controlling lever and having a brake shoe adapted to contact with the rotating element, a lug carried by the brake lever, a pawl pivotally mounted on the adjusting plate aforesaid and engageable with the lug on the brake lever to hold the brake shoe from contact with the rotating element, said pawl cooperating with the spaced guide lugs on the controlling lever and adapted to be engaged with the lug on the brake lever when the'latter is moved by the lug on the controlling lever, and an eccentric cam pivotally mounted upon the casing aforesaid and having a grooved periphery to receive the forked ex: tension of the adjusting plate, said extension and cam comprising indicating means whereby upon movement of the cam into a predetermined position, the arm of the controlling lever may be adjusted tocoijperate with the moving element.

8. An automatic brake for sound reproducing machines comprising, in combination,

a swinging arm, a rotating support, a. spindle for said support, a plate connected with the spindle aforesaid, a controlling lever carried by the plate, a brakelever cooperating with the controlling lever, and means for moving the plate a predetermined extent about the spindle as an axis to adjust the controlling lever for operating the brake lever at a predetermined time.

9. An automatic brake for sound repro ducin g machines .comprising, in combination, a swinging-arm, a rotating support, a brake lever adapted to engage the support, a controlling lever adapted to cooperate with the arm, a pivot common to both the brake and controlling levers, means for holding the brake lever in an inoperative position, means intermediate the arm and last mentioned means adapted to release the brake lever, and a plate adapted to be moved to adjust- 

